GB2263337A - Seismic well source - Google Patents

Seismic well source Download PDF

Info

Publication number
GB2263337A
GB2263337A GB9300970A GB9300970A GB2263337A GB 2263337 A GB2263337 A GB 2263337A GB 9300970 A GB9300970 A GB 9300970A GB 9300970 A GB9300970 A GB 9300970A GB 2263337 A GB2263337 A GB 2263337A
Authority
GB
United Kingdom
Prior art keywords
source
seismic
chamber
well
seismic source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9300970A
Other versions
GB2263337B (en
GB9300970D0 (en
Inventor
Philippe Staron
Jean Laurent
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Publication of GB9300970D0 publication Critical patent/GB9300970D0/en
Publication of GB2263337A publication Critical patent/GB2263337A/en
Application granted granted Critical
Publication of GB2263337B publication Critical patent/GB2263337B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02Generating seismic energy
    • G01V1/143Generating seismic energy using mechanical driving means, e.g. motor driven shaft
    • G01V1/155Generating seismic energy using mechanical driving means, e.g. motor driven shaft using reciprocating masses
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
    • G01V1/42Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators in one well and receivers elsewhere or vice versa
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
    • G01V1/52Structural details

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Earth Drilling (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The seismic source (5) comprises a closed chamber (6) fastened inside a drill collar (4) of the drill string (1). The section thereof is smaller than the inner section of the 21 drill string, so as to allow free circulation of the drilling fluid. A reactive mass (8) is caused to move within this chamber (6) and along the axis of drill string (1). Hydraulic or electro-mechanical means (14-17) allow a strong alternating force of controlled frequency and duration to be applied to this mass. The energy necessary to the operating thereof may be taken from the fluid current. Drilling a well and performing seismic measurement may be achieved at the same time by means of the source by arranging sensors at the surface and/or in one or several (3 adjacent wells. <IMAGE>

Description

1 SEISMIC WELL SOURCE OBJECT OF THE INVENTION 2263337 The object of the
invention is a seismic well source which may be associated with a drill string. The source according to the invention is particularly adapted to communicate to a drill bit in a well periodic shakes and to apply them to the surrounding formations.
BACKGROUND OF THE INVENTION
There are numerous methods for performing seismic prospecting in formations crossed by a well, including the emission of seismic pulse signals or of vibrational signals by a source lowered into the well, in order notably to avoid the disturbances transmitted by the weathering zone when the waves are emitted at the surface, the reception of the waves reflected by the subsoil discontinuities by means of a reception device located in the well, in another well or at the surface, and the recording thereof. Numerous processings are generally applied to the recordings so as to make them more readable to the interpreter.
Among the numerous emission devices for wells, some have been specially designed to work in relation or in combination with a drill bit. These operations, referred to as MWD operations, allow prospecting operations to be achieved without stopping the drilling of a well and therefore exploration costs to be decreased.
2 Emission devices are for example known with which the vibrations applied to formations are the "noises" generated by a drill bit operated at the end of a drillstem or drill string. The amplitude of these shakings may vary to a large extent according to the hardness of the formations crossed by the bit. Conventional processing methods are generally very difficult to utilize with the recordings obtained with this type of emission because the characteristics of the source are not well-known. The signal is emitted permanently and no reference instant can be set. Moreover, the frequency spectrum emitted depends on the rotating speed of the bit and on the nature of the beds drilled. In order to know at any time the phase of the signals emitted, it is necessary to have a sensor located close to the drill bit and any transmission channel allowing a signal in phase with the signals emitted to be transmitted to a surface processing equipment. It may be, for example, the transmission of acoustic waves modulated according to the signals to be transmitted, along the fluid contained in the well, as described for example in patent US-4,675,852, or possibly along the pipes of a drill string.
Among well sources, those which transmit, to the formations crossed, seismic impulses generated by shocks of the drill bit on the hole bottom may also be cited, these shocks being isolated or repeated with a determined period.
To create these shocks, it is possible to use the surface operating device to exert a momentary traction on the drill 3 string and to vary momentarily the force of gravity applied onto the bit. The shocks of the drilling head on the hole bottom may also be generated by a percussion drill bit constituted by interposing, between the drilling head and the drill string, a telescopic hydraulic device which may be contracted through a momentary pressure on the string and which, while slackening with a given delay when this pressure is loosened, applies a shock onto the bit. It is also possible to bring about shocks on the drill bit by triggering off "water hammers" through a sudden interruption of the mud flow circulating within the drill string. The main drawback of devices of this type is that, as they are interposed between the drill bit and the drill string, they require modifications in the usual drilling equipment and they have to bear the total weight exerted on the bit, which may be a source of brittleness.
SUMMARY OF THE INVENTION
The seismic well source according to the invention makes it possible to communicate, to a drill bit linked to a surface installation through a drillstem or drill string, an alternating force of controlled frequency, and to communicate it to the formations at the bottom of a well, without requiring any substantial modification in the usual geometry of drilling equipments.
It comprises an elongate closed chamber having a section smaller than the inner section of the drillstem, in 4 order to allow passage of drilling fluid, this chamber being fastened inside a pipe close to the drill bit, a reactive mass displaceable inside the chamber and along the direction of elongation thereof, and motor means arranged in said chamber for communicating to the reactive mass an alternating force of controlled amplitude and frequency.
According to one embodiment, the means for generating said force comprise, for example, at least one jack with a stationary body with respect to the chamber and a pipe which is fastened to the mass, as well as a hydraulic system communicating with the body of the jack so as to apply the alternating force onto the pipe thereof and onto the reactive mass.
According to another embodiment, the means for generating said force comprise a hollow body fastened inside the chamber, the reactive mass being adapted for sliding in a substantially tight way inside the body, and a hydraulic system communicating with the body on either side of the reactive mass, in order to apply thereto the required alternating force.
The hydraulic system comprises hydraulic circuits containing a fluid, a pump for carrying the fluid into the circuits at a determined pressure, motor means arranged in the chamber to drive the pump and delivery means to supply the fluid under pressure in order to apply the driving alternating force to the reactive mass.
According to another embodiment, elect romechanical means are used to generate said force and linking means are used to transmit the vibrations generated by the electromechanical means to the reactive mass. These means may comprise, for example, piezoelectric elements piloted by an emission assembly or an electro-dynamic vibrator.
According to an advantageous embodiment, the source according to the invention comprises means actuated by a fluid current circulating in the drillstem to produce energy for the running of the motor means, these means comprising for example an electric current generator or a hydraulic energy generator.
The source preferably comprises an electronic piloting assembly for controlling said motor means.
Communication means may be used between the chamber and a surface installation, such as elements providing connection through modulated pressure waves.
The source according to the invention is simply inserted inside a drill pipe and it does not interfere in the transmission of the weight applied onto the bit. It is contained in a closed chamber whose section is smaller than the inner section of the pipe to which it is fastened. It does practically not affect the drilling fluid current circulating inside the drill string and does therefore not modify the drilling parameters. It may work permanently, at 6 determined intervals or on order, by communicating a strong force to the reactive mass inside, a force which is transmitted to the bit through the string. The source may also be totally autonomous and take (by means of a propeller generator for example) the energy necessary for working from the drilling fluid current. In the closed chamber, it is possible to arrange communication means allowing reception, from the surface installation, of orders of triggering and of control of the frequency of the shakings applied and, in return, communication to the surface installation of the working control signals.
Absorption means are preferably interposed on the drill string so as to avoid transmission thereto of at least part of the energy created by the running of the source.
The invention also relates to a method for implementing the seismic source, comprising:
- setting seismic sensors at the surface and/or in at least one well, setting the source interposed on an element of the string close to the drill bit, - drilling a well by means of said drill bit, and - recording the modes received by the seismic sensors in response to the shakings applied to the formations surrounding the well being drilled.
7 The method further comprises transmission of signals between the source and a surface installation, for example, to communicate to the latter a time reference relating to the working of the source.
BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages of the source according to the invention will be clear from reading the description hereafter of embodiments given by way of non limitative examples, with reference to the accompanying drawings in which:
- FIG.! diagrammatically shows a drill rig to which the seismic source according to the invention may be added, - FIG.2 diagrammatically shows a first embodiment of the source with a reactive mass and a jack, - FIG. 3 shows a second embodiment of the source with a reactive mass sliding inside a closed body located in the chamber, and - FIG.4 shows another embodiment where the force applied to the reactive mass is of piezoelectric origin.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The seismic source according to the invention may be associated (FIG.1) with a string of tubular pipes (drill string) 1 connecting a drill bit 2 to a surface installation 8 comprising a derrick 3. It is included for example (FIG.2) inside a tubular drill collar 4 of the drill string close to the drill bit. The seismic source 5 is included in an elongate rigid chamber 6 which is fastened to the inner wall of pipe 4 through flanges 7. The outer section of chamber 6 is smaller than the inner section of pipe 4 and the flanges 7 are arranged to allow passage of the drilling fluid which is circulated from the surface towards the drill bit. A reactive mass 8, which may move parallel to the axis of the chamber and of the pipe between longitudinal guide rails 9, is arranged inside the closed chamber. This reactive mass 8 is integral with driving means capable of imparting thereto an alternating force of controlled amplitude and frequency. These means comprise, for example, a jack 10 provided with a cylindrical body 11 oriented along the axis of the chamber, a piston 12 sliding tightly into the body 11 and a pipe 13 making the piston integral with the reactive mass. A hydraulic system is for example used to apply the alternating force onto piston 12 and thus to reactive mass 8. This system comprises a hydraulic accumulator 14, a hydraulic pump 15 to supply fluid under pressure into accumulator 14, an electric motor 16 to drive the pump, a supply valve 17 and lines 18 allowing the fluid under pressure from accumulator 14 to be applied into the cylinder 11 alternately on one side or on the opposite side of piston 12 so as to generate a strong alternating force which is communicated to the reactive mass 8. An electronic assembly 19 is also arranged inside the chamber to pilot the delivery 9 of fluid by valve 17 so that the frequency of the alternating force applied at any time to the mass is welldefined or that this frequency follows in time a welldefined variation law. An electric generator such as an alternator 20 is for example arranged in the chamber. Its axis 21 is oriented parallel to that of the drill pipe and it goes through the wall of the chamber. It is connected to a propeller 22 which is driven in rotation by the drilling fluid that is circulated inside towards the drill bit.
Absorption means (of the type known by specialists as shock absorber for example) are interposed on the drill string above the source to prevent transmission, to the string, of the seismic energy generated by the working of the source.
Communication between the source and the surface installation may be achieved with a well-known technique by means of modulated or coded acoustic waves which are propagated along the well in the drilling fluid. To that end, the electronic assembly 19 is connected to an assembly for the emission-redption of acoustic signals (not shown) comprising transductor means arranged outside the chamber.
However, the source may also work automatically either permanently, with an uninterrupted chain of emission sequences where the emitted frequency varies according to a predetermined variation law, or discontinuously, with successive emission periods where the emission frequency is fixed or variable, separated by time intervals during which the emission is interrupted.
The means for applying the force and the reactive mass are selected so as to develop and to transmit to the bit a force strong enough. An adequate selection makes it possible to obtain an alternating force that is properly proportionate to the weight of the drill string weighing on the drill bit, so as to consequently generate a strong alternating shake in the formations in contact with the bit.
If the mass of the drill string is about 10 4 kg, the hydraulic system is adapted to generate an alternating force of about 2.10 4 Newton.
According to another embodiment (FIG.3), the reactive mass 8 is adapted to slide tightly into a cylindrical cavity inside a hollow body 23 integral with chamber 6 and the hydraulic circuits connect the two opposite ends of the hollow body 23 on either side of the mass with supply valve 17.
According to another embodiment, the reactive mass (FIG.4) is in contact with an array 24 of piezoelectric pellets piled and connected in series or in parallel, depending on the case, to the terminals of an appropriate electric generator 25. Transmission of the force may be achieved through direct mechanical coupling between the block and the reactive mass, or by way of hydraulic linking Z 1 1 means comprising hydraulic circuits and a coupling jack (not shown).
According to another embodiment, the electric generator 20 may be replaced by a hydraulic generator directly driven by propeller 22 in order to charge accumulator 14 and to actuate the reactive mass.
Without departing from the scope of the invention, the hydraulic or piezoelectric motor means described above may be replaced by any other means for creating an alternating f orce.
With the seimic source described above, seismic exploration operations can be performed while drilling a well. An array of seismic sensors is arranged at the surface and/or in another well, and the waves which they receive in response to the shakings applied onto the formations surrounding the wellbore bottom through the source are recorded.
12

Claims (20)

We claim:
1) A seismic well source for communicating, to a drill bit connected to a surface installation by a tubular drill string (1), an alternating force of controlled frequency, comprising an elongate closed chamber (6) having a section smaller than the inner section of the drill string so as to allow passage of drilling fluid, this chamber being fastened inside a pipe (4) close to the drill bit (2), a reactive mass (8) displaceable inside the chamber (6) and along the direction of elongation thereof, and motor means arranged in said chamber to communicate to the reactive mass an alternating force of controlled amplitude and frequency.
is 2) A seismic source as claimed in claim 1, wherein the motor means for generating said force comprise at least one jack (10) with a stationary body with respect to chamber (6) and a pipe which is fastened to the mass, as well as a hydraulic system (14-17) communicating with the jack to apply to the pipe of the jack said alternating force.
3) A seismic source as claimed in claim 1, wherein the motor means for generating said force comprise a hollow body (23) fastened inside the chamber (6), the reactive mass (8) being adapted to slide in a substantially tight way inside the body, and a hydraulic system (14-17) communicating with the body (23) on either side of the reactive mass (8), to apply thereto said alternating force.
13 1 4) A seismic source as claimed in claim 2 or 3, wherein the hydraulic system comprises hydraulic circuits containing a fluid, a pump (15) for supplying the fluid into the circuits at a determined pressure, motor means (16) arranged in the chamber for driving the pump and delivery means (17) to supply the fluid under pressure so as to apply to the reactive mass (8) the alternating force.
5) A seismic source as claimed in claim 1, comprising electro-mechanical means (24) to generatesaid force and linking means to transmit the vibrations generated by the electro-mechanical means to said reactive mass.
6) A seismic source as claimed in claim 5, wherein the electro-mechanical means comprise piezoelectric elements piloted by an emission assembly.
is 7) A seismic source as claimed in claim 5, wherein the electro-mechanical means comprise an electro-dynamic vibrator.
8) A seismic source as claimed in any one of the previous claims, comprising means (20) operated by a fluid current circulating in the drill string to produce energy for the running of the motor means.
9) A seismic source as claimed in claim 8, wherein the means (20) for producing energy comprise an electric current generator.
14 10) A seismic source as claimed in claim 8, wherein the means (20) for producing energy comprise a hydraulic energy generator.
11) A seismic source as claimed in any one of the previous claims, comprising an electronic piloting assembly for controlling said motor means.
12) A seismic source as claimed in any one of the previous claims, comprising communication means between said chamber and a surface installation.
13) A seismic source as claimed in the previous claim, wherein the communication means comprise elements providing connection through modulated pressure waves.
14) A seismic source as claimed in any one of the previous claims, comprising interposed absorption means to prevent tranmission, to the drill string, of at least part of the energy generated through the working of the source.
15) A method for implementing the seismic source as claimed in any one of claims 1 to 14, comprising:
- setting seismic sensors at the surface and/or in at least one well, setting the source in the pipe interposed on the drill string close to the drill bit, - drilling a well by means of said drill bit, and 1 7 recording the waves received by the seismic sensors in response to the shakings applied to the formations surrounding the well during drilling.
16) A method as claimed in claim 15, comprising the transmission of signals between the source and a surface installation.
17) A seismic well source substantially as hereinbefore described with reference to figure 2 of the drawings.
18) A seismic well source substantially as hereinbefore described with reference to figure 3 of the drawings.
19) A seismic well source substantially as hereinbefore described with reference to figure 4 of the drawings.
20) A method substantially as hereinbefore described with reference to figures 1 to 4 of the drawings.
GB9300970A 1992-01-20 1993-01-19 Seismic well source Expired - Fee Related GB2263337B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9200631A FR2686425B1 (en) 1992-01-20 1992-01-20 SEISMIC SOURCE OF WELL.

Publications (3)

Publication Number Publication Date
GB9300970D0 GB9300970D0 (en) 1993-03-10
GB2263337A true GB2263337A (en) 1993-07-21
GB2263337B GB2263337B (en) 1995-12-13

Family

ID=9425857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9300970A Expired - Fee Related GB2263337B (en) 1992-01-20 1993-01-19 Seismic well source

Country Status (5)

Country Link
US (1) US5382760A (en)
CA (1) CA2087666C (en)
FR (1) FR2686425B1 (en)
GB (1) GB2263337B (en)
NO (1) NO303853B1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5540295A (en) * 1995-03-27 1996-07-30 Serrette; Billy J. Vibrator for drill stems
US5901113A (en) * 1996-03-12 1999-05-04 Schlumberger Technology Corporation Inverse vertical seismic profiling using a measurement while drilling tool as a seismic source
US6237701B1 (en) * 1997-11-17 2001-05-29 Tempress Technologies, Inc. Impulsive suction pulse generator for borehole
US6349778B1 (en) 2000-01-04 2002-02-26 Performance Boring Technologies, Inc. Integrated transmitter surveying while boring entrenching powering device for the continuation of a guided bore hole
WO2004072682A1 (en) * 2003-02-11 2004-08-26 Noble Drilling Services, Inc. Seismic energy source for use during wellbore drilling
US7562740B2 (en) * 2003-10-28 2009-07-21 Schlumberger Technology Corporation Borehole acoustic source
GB0401504D0 (en) * 2004-01-23 2004-02-25 Poggiagliolmi Elio A device for picking olives
MY138424A (en) * 2004-01-23 2009-06-30 Shell Int Research Hydraulic motor arrangement and method of operating a hydraulic motor
US7748446B2 (en) * 2004-01-23 2010-07-06 Shell Oil Company Seismic source and method of generating a seismic wave in a formation
US9038746B2 (en) * 2008-04-07 2015-05-26 Schlumberger Technology Corporation Method for determining wellbore position using seismic sources and seismic receivers
US10227862B2 (en) 2008-04-07 2019-03-12 Schlumberger Technology Corporation Method for determining wellbore position using seismic sources and seismic receivers
US8607896B2 (en) * 2009-06-08 2013-12-17 Tempress Technologies, Inc. Jet turbodrill
US9279300B2 (en) 2010-11-30 2016-03-08 Tempress Technologies, Inc. Split ring shift control for hydraulic pulse valve
US8528649B2 (en) 2010-11-30 2013-09-10 Tempress Technologies, Inc. Hydraulic pulse valve with improved pulse control
US20160130938A1 (en) * 2010-11-30 2016-05-12 Tempress Technologies, Inc. Seismic while drilling system and methods
EP2872729A4 (en) 2012-07-16 2016-06-29 Tempress Technologies Inc Extended reach placement of wellbore completions
US9081110B2 (en) * 2012-12-18 2015-07-14 Schlumberger Technology Corporation Devices, systems and methods for low frequency seismic borehole investigations
US9599750B2 (en) * 2013-10-14 2017-03-21 Hunt Energy Enterprises L.L.C. Electroseismic surveying in exploration and production environments

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4674591A (en) * 1986-02-28 1987-06-23 Urs Corporation Method and apparatus for seismic exploration
WO1987005708A1 (en) * 1986-03-18 1987-09-24 Chevron Research Company Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations
GB2235047A (en) * 1989-07-26 1991-02-20 Atlantic Richfield Co Seismic pofiling using drilling vibrations
EP0442812A1 (en) * 1990-02-14 1991-08-21 Schlumberger Limited Downhole seismic source and method for generating sound waves in a borehole

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB752296A (en) * 1954-08-15 1956-07-11 Socony Mobil Oil Co Mechanically coupled acoustic well logging system
FR1417979A (en) * 1962-11-03 1965-11-19 Inst Francais Du Petrole Improvement in vibrators
US3282372A (en) * 1962-11-14 1966-11-01 Continental Oil Co Direct drive method and apparatus for generating seismic vibratory signals
US3934673A (en) * 1972-02-07 1976-01-27 Daniel Silverman Vibrator systems for generating elastic waves in the earth
US3983957A (en) * 1972-10-11 1976-10-05 Daniel Silverman Method and apparatus for creating seismic waves in the earth
US3866709A (en) * 1973-11-12 1975-02-18 Exxon Production Research Co Vibratory seismic energy generator
US4040003A (en) * 1974-10-02 1977-08-02 Standard Oil Company (Indiana) Downhole seismic source
US4207619A (en) * 1975-02-24 1980-06-10 Alf Klaveness Seismic well logging system and method
US4033429A (en) * 1976-02-18 1977-07-05 Standard Oil Company (Indiana) Downhole seismic source
US4144949A (en) * 1977-05-02 1979-03-20 Daniel Silverman Bit positioning while drilling system
SU716013A1 (en) * 1978-01-05 1980-02-15 Всесоюзный научно-исследовательский и проектно-конструкторский институт геофизических исследований геологоразведочных скважин Acoustic insulator for acoustic well-logging apparatus
US4252209A (en) * 1979-01-17 1981-02-24 Daniel Silverman Downhole liquid pressure seismic source and bit positioning system
US4388981A (en) * 1981-02-23 1983-06-21 Conoco Inc. Variable cylinder hydraulic vibrator and control system
GB8331111D0 (en) * 1983-11-22 1983-12-29 Sperry Sun Inc Signalling within borehole whilst drilling
US5031158A (en) * 1984-03-23 1991-07-09 The Charles Stark Draper Laboratory, Inc. Method and apparatus for drill bit location
US4703343A (en) * 1984-12-25 1987-10-27 Matsushita Electric Industrial Co., Ltd. Noise reduction feedback type comb filter
US4751688A (en) * 1986-03-18 1988-06-14 Chevron Research Company Downhole electromagnetic seismic source
US5063542A (en) * 1989-05-17 1991-11-05 Atlantic Richfield Company Piezoelectric transducer with displacement amplifier
US4991685A (en) * 1989-10-02 1991-02-12 Atlantic Richfield Company Downhole seismic source

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4674591A (en) * 1986-02-28 1987-06-23 Urs Corporation Method and apparatus for seismic exploration
WO1987005708A1 (en) * 1986-03-18 1987-09-24 Chevron Research Company Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations
GB2235047A (en) * 1989-07-26 1991-02-20 Atlantic Richfield Co Seismic pofiling using drilling vibrations
EP0442812A1 (en) * 1990-02-14 1991-08-21 Schlumberger Limited Downhole seismic source and method for generating sound waves in a borehole
US5137109A (en) * 1990-02-14 1992-08-11 Schlumberger Technology Corporation Method and apparatus for creating seismic waves in a borehole

Also Published As

Publication number Publication date
FR2686425B1 (en) 1997-01-24
GB2263337B (en) 1995-12-13
CA2087666A1 (en) 1993-07-21
GB9300970D0 (en) 1993-03-10
NO303853B1 (en) 1998-09-07
NO930161L (en) 1993-07-21
FR2686425A1 (en) 1993-07-23
NO930161D0 (en) 1993-01-18
CA2087666C (en) 2004-08-17
US5382760A (en) 1995-01-17

Similar Documents

Publication Publication Date Title
US5382760A (en) Seismic well source
US4993001A (en) Method and apparatus for converting tube waves to body waves for seismic exploration
US6094401A (en) Inverse vertical seismic profiling using a measurement while drilling tool as a seismic source
US6891481B2 (en) Resonant acoustic transmitter apparatus and method for signal transmission
US7617886B2 (en) Fluid-actuated hammer bit
US5372207A (en) Seismic prospecting method and device using a drill bit working in a well
CA1328685C (en) Nondestructive downhole seismic vibrator source and process of utilizing the vibrator to obtain information about geologic formations
US8485277B2 (en) Bottom-hole assembly, and a method and system for transmitting data from a bottom-hole assembly
US7339494B2 (en) Acoustic telemetry transceiver
JP5352674B2 (en) Reverse vertical borehole seismic survey by impact measurement in both directions during excavation
US4805727A (en) Down hole periodic seismic generator
US6172614B1 (en) Method and apparatus for remote actuation of a downhole device using a resonant chamber
US20190100965A1 (en) Down-Hole Vibrational Oscillator
CA1310101C (en) Method for measuring acoustic impedance and dissipation of medium surrounding a borehole
WO2001011191A1 (en) Method and apparatus for drill stem data transmission
GB2276723A (en) Monitoring subterranean formations
CA2031093A1 (en) Directional drilling tool
WO2013172837A1 (en) Variable stiffness downhole tool housing
WO2002057808A2 (en) Apparatus and method for using a surface oscillator as a downhole seismic source
US5414673A (en) Sonic measurement while drilling
CA1317367C (en) Method and apparatus for converting tube waves to body waves for seismic exploration
CA2305161A1 (en) Method and apparatus for drill stem data transmission
US5225638A (en) Hydrogen-oxygen acoustic logging device
US20070044959A1 (en) Apparatus and method for evaluating a formation
RU1787277C (en) Method and device for generation of vibroseis signals in well

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050119